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Car Audio Equipment
Amplifiers
Amplifier Gain Issue
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<blockquote data-quote="slikrider20" data-source="post: 8510984" data-attributes="member: 563044"><p>Right now, I have an older TMA 1000.1 and i've been trying to set the gain on it with a DMM. I have no problems whatsoever reaching the desired voltage on my other amp. Both amps are sharing the same ground.</p><p></p><p>With The TMA 1000.1 amp, when I have the gain at 0, the voltage is ridiculously high (like 100+ AC volts) and when I turn the gain up, the voltage goes down, which is bizarre. But this doesn't correlate to how the sub sounds, when I turn the gain up - the sub gets louder and vise versa. What the heck is possibly going on here? I'm stumped.</p><p></p><p>Also - just to confirm. The way I would calculate the voltage I need to reach on a 2 channel amp that has one gain control and does 115x2 @ 4ohms would be to take 115x2 for a total of 230, then take that times 4ohms for a total of 920? Then sq rt that and get 30.33 volts, correct?</p><p></p><p>Edit: ^ I had that wrong. I don't multiple the 115 times both channels, I just take 115watts x 4 ohms and take the sq rt of that for a total of 21.45 volts.</p></blockquote><p></p>
[QUOTE="slikrider20, post: 8510984, member: 563044"] Right now, I have an older TMA 1000.1 and i've been trying to set the gain on it with a DMM. I have no problems whatsoever reaching the desired voltage on my other amp. Both amps are sharing the same ground. With The TMA 1000.1 amp, when I have the gain at 0, the voltage is ridiculously high (like 100+ AC volts) and when I turn the gain up, the voltage goes down, which is bizarre. But this doesn't correlate to how the sub sounds, when I turn the gain up - the sub gets louder and vise versa. What the heck is possibly going on here? I'm stumped. Also - just to confirm. The way I would calculate the voltage I need to reach on a 2 channel amp that has one gain control and does 115x2 @ 4ohms would be to take 115x2 for a total of 230, then take that times 4ohms for a total of 920? Then sq rt that and get 30.33 volts, correct? Edit: ^ I had that wrong. I don't multiple the 115 times both channels, I just take 115watts x 4 ohms and take the sq rt of that for a total of 21.45 volts. [/QUOTE]
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